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Data Scan rate..


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#1 Coyttl

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Posted 02 August 2016 - 12:02 PM

This may be a silly question, but not knowing the proper/exact terminology to reference, added to the overhead of the .NET Micro Framework, I figured I'd ask here and get some input -

 

If I had a data bus running at 1Mhz (high -> low 1 every ms), would the Netduino 3 (hell, or 2 for that matter!) be able to scan Digital inputs fast enough to not lose any state changes?

 

I know the chip runs at a higher speed, but wasn't sure how much of that was put towards scanning ins/outs and put towards basic running of the MF.

 

Cheers -

Mike



#2 Nevyn

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Posted 02 August 2016 - 06:45 PM

If you are using interrupts to track the changes in the data rate then I would not trust the Netduino to keep up.

 

The SPI bus will certainly work at higher rates but that is using the SPI protocol.

 

Regards,

Mark


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#3 Coyttl

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Posted 05 August 2016 - 03:41 PM

Thanks! Yeah, I can't use SPI unfortunately - looking into getting the Netduino connected up to the databus of an old 6809 processor, and it looks like I may have to do some filtering of address lines before the 'duino to filter out unwanted address calls.

 

Thanks!

-Mike






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